IDENTIFIERS

  • Current Taxon Name (Soil Name): Clarksdale
  • OSD
  • Series Extent
  • User Site ID: S1977IL095082
  • User Pedon ID: S1977IL095082
  • Lab Information:
  • Certified Lab Pedon Description - yes
  • Lab Source ID - IL SCL
  • Lab Pedon # - 77IL095082
  • NCSS Pedon Lab Data NASIS Record ID - 20941
  • Print Date: 6/3/2024

    • LOCATION

  • Location In Web Soil Survey
  • AOI is roughly a square mile and pedon is marked in the center.
  • Location in SoilWeb
  • Location in Google Maps
  • Std. Latitude: 40.9963829
  • Std. Longitude: -89.9874732
  • Datum: WGS84
  • Township: 12N
  • Range: 4E
  • Section: 25
  • PLSS Details: NE 160, SE 40, SE 10
  • Location Description: 50 feet from gravel road Victory Township
  • Map Unit: 257A—Clarksdale silt loam, 0 to 2 percent slopes
  • Country: US—United States
  • State: Illinois
  • County: IL095—Knox
  • MLRA: 115—Central Mississippi Valley Wooded Slopes
  • Regional Office: NC—North Central
  • MLRA Soil Survey Area: NC-SPI—Springfield, Illinois
  • Non-MLRA Soil Survey Area: IL095—Knox County, Illinois
  • 7.5 Minute USGS Quad: 40089-H8—Laura, Illinois

    • PEDON

  • Describers Name: Roger D. Windhorn & crew
  • Current Taxonomic Class: Fine, smectitic, mesic Udollic Endoaqualfs
  • Current Taxon Kind: series
  • Pedon Type: classifies to current taxon name, full description
  • Pedon Purpose: soil survey inventory
  • Pedon Record Orgin: PedonPC
  • Pedon #: 82
  • Correlated Information:
  • Soil Name - Clarksdale
  • PSC - 33 to 83 cm.
  • Classificaton Date - 1/4/2010
  • Soil Taxonomic Edition - twelfth edition
  • Moisture Class - aquic
  • Moisture Subclass - aeric
  • Sampled As Information:
  • Soil Name - Clarksdale
  • PSC - 33 to 83 cm.
  • Classificaton Date - 11/1/1977
  • Dynamic Soil Properties:
  • Erosion Class - 1
  • Pedoderm Loose Cover Indicator - no
  • Hydric: no


    • SITE

  • Parent Material: Fine-textured Peoria Loess
  • Landscape: till plain
  • Landform: ground moraine
  • Hill Slope Profile: summit
  • Runoff: low
  • Drainage Class: somewhat poorly
  • Surface Fragments:
  • Benchmark Soil?: no

    • VEGETATION

    SITE OBSERVATION

  • Observation Date: 11/1/1977 (actual site observation date)
  • Surface Cover Properties:
  • Site Obs. Cover Kind 1 - crop cover
  • Site Obs. Cover Kind 2 - row crop
  • Pedoderm Loose Cover Indicator - no
  • Drained? - no
  • Bedded Soil? - no
  • Forest Plantation? - no
    • Pedon Horizon Lab Results - 1
    Horizon Top Depth Bottom Depth Sample ID Data Collector Total Clay CaCO3 Clay Total Silt Fine Silt Co. Silt Total Sand Total Sand Method VC Sand Co. Sand Med. Sand Fine Sand VF Sand VF Sand Method Texture Class - Field Lab Rubbed Fiber Unrubbed Fiber pH H2O
    cm cm % % % % % % % % % % % % %

    Ap

    A

    E

    Bt

    Btg1

    Btg2

    Btg3

    C

    0

    13

    23

    33

    56

    74

    91

    127

    13

    23

    33

    56

    74

    91

    127

    152

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    Pedon Horizon Lab Results - 2
    Horizon Top Depth Bottom Depth Sample ID pH CaCl2 pH NaF pH Ox Delta pH LL PL PI Atter. Samp. Cond. COLE Pot. Acidity Ca + Mg - Meh 2 K Ca + Mg - Sat. Paste KCl Extract. Acidity Base Sat. - Meh 2 CEC-7 CEC-8.2
    cm cm % % % cm/cm meq/100g cmol(+)/kg cmol(+)/kg mmol(+)/l cmol(+)/kg % cmol(+)/kg cmol(+)/kg

    Ap

    A

    E

    Bt

    Btg1

    Btg2

    Btg3

    C

    0

    13

    23

    33

    56

    74

    91

    127

    13

    23

    33

    56

    74

    91

    127

    152

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    Pedon Horizon Lab Results - 3
    Horizon Top Depth Bottom Depth Sample ID ECEC Phosphate P NO3-N EC EC Method EC 1:5 by volume CaCO3 Equiv. Equiv. Gypsum Na SAR Gypsum Req. Humic Color Fulvic Color Humic + Fulvic Color Al PI Pyro. Hue PyrO. Value Pyro. Chroma
    cm cm cmol(+)/kg mg/kg mg/kg dS/m dS/m % % mmol(+)/l % L-pcu/g L-pcu/g L-pcu/g %

    Ap

    A

    E

    Bt

    Btg1

    Btg2

    Btg3

    C

    0

    13

    23

    33

    56

    74

    91

    127

    13

    23

    33

    56

    74

    91

    127

    152

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    Pedon Diagnostic Features
    Feature Kind Feature Depth L-H Feature Thickness L-RV-H
    cm

    ochric epipedon

    argillic horizon

    0—33

    33—127

    —33—

    —94—
    Setting and Climate
    Slope Slope Length USLE Upslope Length Elev. Corr. Elev Aspect MAP REAP FFD MAAT MSAT MWAT MAST MSST MWST MFFP PE Index Climate Station ID Climate Station Name Climate Station Type
    % m degrees mm mm C mm

    2

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    Ap—0 to 13 centimeters (0.0 to 5.1 inches); very dark grayish brown (10YR 3/2), grayish brown (10YR 5/2), dry; silt loam; weak medium granular structure; friable; fragments; neutral, pH 7.2; clear smooth boundary. Lab sample # IL25057
    A—13 to 23 centimeters (5.1 to 9.1 inches); very dark grayish brown (10YR 3/2), grayish brown (10YR 5/2), dry; silt loam; weak fine subangular blocky parts to moderate medium granular structure; friable; fragments; neutral, pH 7.2; abrupt smooth boundary. Lab sample # IL25058
    E—23 to 33 centimeters (9.1 to 13.0 inches); grayish brown (10YR 5/2), light gray (10YR 7/2), dry; silt loam; weak thick platy parts to moderate medium granular structure; friable; 1 percent fine prominent irregular red (2.5YR 5/6), moist, masses of oxidized iron with sharp boundaries in matrix and 10 percent prominent cylindrical light gray (10YR 7/2), dry, clay depletions with sharp boundaries on faces of peds; fragments; neutral, pH 7.0; clear smooth boundary. Lab sample # IL25059
    Bt—33 to 56 centimeters (13.0 to 22.0 inches); brown (10YR 5/3) silty clay loam; and mottles; moderate fine subangular blocky structure; friable; 25 percent distinct dark grayish brown (10YR 4/2), moist, clay films on all faces of peds; 1 percent fine prominent irregular yellowish brown (10YR 5/8), moist, masses of oxidized iron with clear boundaries in matrix and 1 percent fine prominent cylindrical red (2.5YR 5/6), moist, masses of oxidized iron with sharp boundaries in matrix and 10 percent prominent cylindrical light gray (10YR 7/2), dry, clay depletions with sharp boundaries on faces of peds and 50 percent medium faint cylindrical grayish brown (10YR 5/2), moist, iron depletions with clear boundaries in matrix; fragments; slightly acid, pH 6.2; clear smooth boundary. Lab sample # IL25060. continuous - phpvsfiid 1414279; continuous - phpvsfiid 1414279
    Btg1—56 to 74 centimeters (22.0 to 29.1 inches); grayish brown (10YR 5/2) silty clay loam; and mottles; moderate medium prismatic parts to moderate medium angular blocky structure; friable; 35 percent distinct very dark gray (10YR 3/1), moist, organoargillans on all faces of peds; 1 percent fine faint irregular light brownish gray (10YR 6/2), moist, iron depletions with clear boundaries in matrix and 1 percent fine faint irregular light brownish gray (2.5Y 6/2), moist, iron depletions with clear boundaries in matrix and 1 percent fine prominent spherical black (5YR 2.5/1), moist, manganese masses with sharp boundaries throughout and 10 percent fine prominent irregular strong brown (7.5YR 4/6), moist, and red (2.5YR 5/6), moist, masses of oxidized iron with clear boundaries in matrix and 10 percent fine prominent irregular masses of oxidized iron with clear boundaries in matrix and 10 percent medium prominent irregular red (2.5YR 5/6), moist, masses of oxidized iron with clear boundaries in matrix; fragments; very strongly acid, pH 5.0; gradual smooth boundary. Lab sample # IL25061. continuous - phpvsfiid 1414280; continuous - phpvsfiid 1414280
    Btg2—74 to 91 centimeters (29.1 to 35.8 inches); grayish brown (10YR 5/2) silty clay loam; and mottles; weak medium prismatic parts to moderate medium angular blocky structure; friable; 25 percent distinct very dark gray (10YR 3/1), moist, organoargillans on all faces of peds; 10 percent medium prominent irregular and black (5YR 2.5/1), moist, manganese masses with clear boundaries throughout and 10 percent medium prominent irregular yellowish brown (10YR 5/8), moist, and light olive brown (2.5Y 5/6), moist, masses of oxidized iron with diffuse boundaries in matrix and 10 percent medium prominent irregular red (2.5YR 5/6), moist, masses of oxidized iron with diffuse boundaries in matrix and 10 percent fine faint irregular gray (2.5Y 6/1), moist, iron depletions with clear boundaries in matrix; fragments; slightly acid, pH 6.1; clear smooth boundary. Lab sample # IL25062. continuous - phpvsfiid 1414281; continuous - phpvsfiid 1414281
    Btg3—91 to 127 centimeters (35.8 to 50.0 inches); variegated 70 percent gray (2.5Y 6/1) and 30 percent yellowish brown (10YR 5/8) silty clay loam; weak medium prismatic parts to moderate medium angular blocky structure; friable; 10 percent prominent very dark gray (10YR 3/1), moist, organoargillans on surfaces along pores and 10 percent prominent organoargillans on surfaces along root channels; 10 percent fine prominent platy black (5YR 2.5/1), moist, manganese masses with clear boundaries throughout; fragments; neutral, pH 6.6; gradual smooth boundary. Lab sample # IL25063. continuous - phpvsfiid 1414277; continuous - phpvsfiid 1414278; continuous - phpvsfiid 1414277; continuous - phpvsfiid 1414278
    C—127 to 152 centimeters (50.0 to 59.8 inches); yellowish brown (10YR 5/4) silt loam; and mottles; massive; firm; 10 percent prominent very dark gray (10YR 3/1), moist, organoargillans on vertical faces of peds and 10 percent prominent very dark gray (10YR 3/1), moist, organoargillans on vertical faces of peds; 10 percent medium prominent irregular black (5YR 2.5/1), moist, manganese masses with diffuse boundaries on surfaces along pores and 10 percent medium prominent irregular yellowish brown (10YR 5/8), moist, masses of oxidized iron with diffuse boundaries in matrix and 10 percent fine distinct irregular dark grayish brown (10YR 4/2), moist, iron depletions with diffuse boundaries in matrix; fragments; neutral, pH 6.6. continuous - phpvsfiid 1414282; continuous - phpvsfiid 1414283; continuous - phpvsfiid 1414282; continuous - phpvsfiid 1414283